GM Enhanced (OBD II) Diagnostics

Select View Data from theGM Func-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tion List and press

 

.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GM arranges the PIDs in four groups:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Analog: viewing of analog sensor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

signals, such as measured volt-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

age from O2 sensors, tempera-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ture sensors, and air flow

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

sensors.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O2: viewing oxygen sensor information.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Misfire: viewing of cylinder misfire information.

 

 

 

 

 

 

 

 

 

 

 

 

Digital: viewing of switches, solenoids and

 

 

ys.

 

 

 

 

 

 

 

 

Some GM trucks manufactured in 1996 – 1998 h ve only

ne PID group.

 

 

 

For these vehicles, the selection menu do

not

 

ppear.

 

 

 

 

 

 

 

After selecting a group, the scan tool

GMFunctionList

 

 

asks the vehicle to provide the PIDs it

 

 

supports for that group.

 

 

 

 

 

ENTER

 

4EraseCodes]

 

 

 

 

5

The scan tool displays a menu with dis-

`5

 

 

 

 

 

 

 

Data

 

Data

[

 

 

 

 

 

 

 

 

 

 

 

 

play options. Use the

 

to

6)View

 

 

Freeze

 

 

 

 

select an option and press

 

.

Select

 

PidGroup

 

 

Refer to “ViewingData” on page 3-9 to

 

 

 

setup the data list.

 

 

 

 

 

 

 

 

 

 

`Analog

 

 

 

 

 

on link. Mul[

 

 

After making a selection, press

 

to establiO2

h

communic

-

 

 

 

 

 

Misfire

 

 

 

 

 

 

~

 

 

tiple PIDs may be sent if the vehicle is equipped

 

h

 

ore han one computer

module — Powertrain Control Module (PCM), Tr nsmiss on Contr

l

 

odule

 

 

(TCM), etc. The scan tool identifies them by th

ir

 

dentific

n names (ID)

 

 

 

assigned by the manufacturer (i.e. $40 or $1F).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If the Scan Tool receives multiple

 

ValidatingPID23of99PIDMap

 

 

 

responses for a PID, such as MIL STA-

 

 

 

TUS, it displays the PID and with the

 

 

 

computer module ID blinking in paren-

 

 

 

theses.

 

 

 

 

 

 

If one or more modules stops responding, the scan

 

Please Wait

 

 

 

 

 

 

l displ

ys mes age that

the module is not responding and asks to cont

ue without it. If No

 

elected,

the Scan Tool attempts to reestablish commuSelect`ica

Datawi Datah thatSetupToViewm d le. ~

 

 

 

UP/DOWN

 

Entire

 

 

 

 

 

List

 

 

 

 

 

ENTER

 

 

 

 

 

 

 

 

 

 

 

 

Custom

 

 

 

 

 

 

 

 

 

 

 

View

 

 

 

 

 

 

 

 

 

 

 

 

 

ENTERMILSTATUS(ENGINE(RPM)($$110)NA0)56[AO2FF61~

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Page 57
Image 57
Actron 9640A manual Select View Data from theGM Func Tion List and press